This article has an erratum: [erratum]
Volume 581, September 2015
|Number of page(s)||5|
|Published online||07 September 2015|
VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno ⋆
1 Department of Mathematics, Tampere University of Technology, PO Box 553, 33101 Tampere, Finland
2 Astronomical Institute, Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 18000 Prague, Czech Republic
3 ACME, IMCCE, UMR 8028 du CNRS, UPMC, Université de Lille 1, 77 Av. Denfert-Rochereau, 75014 Paris, France
4 Laboratoire Lagrange, UMR 7293 CNRS, UNS, Observatoire de la Côte d’Azur, 06304 Nice, France
5 European Southern Observatory (ESO), Alonso de Còrdova 3107, 1900 Casilla Vitacura, Santiago, Chile
6 Aix-Marseille University, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388 Marseille, France
7 ONERA − Optics Department, 29 avenue de la Division Leclerc, 92322 Chatillon Cedex, France
8 Southwest Research Institute, 1050 Walnut St., #300 Boulder, CO 80302, USA
9 Unidad Mixta Internacional FCA (UMI 3386), CNRS/INSU & Universidad de Chile, Las Condes, Santiago, Chile
10 LESIA (UMR 8109), Observatoire de Paris, CNRS, UPMC, Univ. Paris-Diderot, PSL, 5 place Jules Janssen, 92195 Meudon, France
Received: 28 May 2015
Accepted: 12 August 2015
We use the recently released Atacama Large Millimeter Array (ALMA) and VLT/SPHERE science verification data, together with earlier adaptive-optics images, stellar occultation, and lightcurve data to model the 3D shape and spin of the large asteroid (3) Juno with the all-data asteroid modelling (ADAM) procedure. These data set limits on the plausible range of shape models, yielding reconstructions suggesting that, despite its large size, Juno has sizable unrounded features moulded by non-gravitational processes such as impacts.
Key words: instrumentation: interferometers / instrumentation: adaptive optics / methods: numerical / minor planets, asteroids: individual: (3) Juno
Based on observations collected at the European Southern Observatory, Paranal, Chile (prog. ID: 60.A-9379, 086.C-0785), and at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation.
© ESO, 2015
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